Alert archive / Massachusetts / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Massachusetts, 2020
156 severe thunderstorm warnings in 2020. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Severe Thunderstorm Warnings
- 156
- Busiest month
- August48 severe thunderstorm warnings
- Busiest day
- August 23, 202015 severe thunderstorm warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 8:34 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 26 min |
| Mar 29, 8:41 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 19 min |
| Mar 29, 8:47 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 36 min |
| Mar 29, 8:52 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Worcester | 38 min |
| Mar 29, 8:55 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 30 min |
| Mar 29, 9:52 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Plymouth | 38 min |
| Mar 29, 10:13 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Bristol, Plymouth | 19 min |
| Apr 9, 3:32 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Bristol, Dukes, Plymouth | 58 min |
| Apr 9, 4:24 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Dukes, Nantucket | 66 min |
| May 11, 7:24 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, Worcester | 25 min |
| May 15, 6:47 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 43 min |
| May 15, 6:49 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 56 min |
| May 15, 7:13 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 47 min |
| May 15, 7:17 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 58 min |
| May 15, 7:29 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 16 min |
| May 15, 7:31 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Middlesex, Worcester | 59 min |
| May 15, 8:06 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 54 min |
| May 15, 8:08 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Worcester | 52 min |
| May 15, 8:15 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 60 min |
| May 15, 8:34 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, Middlesex, Norfolk, Worcester | 41 min |
| May 15, 8:48 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Suffolk | 35 min |
| May 15, 8:59 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk and 1 more | 61 min |
| Jun 6, 2:15 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 60 min |
| Jun 6, 2:39 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 66 min |
| Jun 6, 2:51 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Worcester | 54 min |
| Jun 6, 3:29 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Plymouth, Suffolk | 61 min |
| Jun 6, 8:38 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Suffolk, Worcester | 52 min |
| Jun 6, 9:12 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk | 48 min |
| Jun 28, 1:26 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk | 64 min |
| Jun 28, 3:02 PM EDT | Severe Thunderstorm Warning | BOX | Plymouth | 35 min |
| Jun 28, 3:16 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 59 min |
| Jun 28, 4:02 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Plymouth, Suffolk | 58 min |
| Jun 28, 4:39 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 51 min |
| Jun 28, 4:58 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth, Worcester | 62 min |
| Jun 28, 5:02 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 58 min |
| Jun 28, 5:05 PM EDT | Severe Thunderstorm Warning | BOX | Norfolk, Worcester | 55 min |
| Jun 28, 6:04 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Worcester | 56 min |
| Jun 29, 9:28 AM EDT | Severe Thunderstorm Warning | BOX | Nantucket | 32 min |
| Jun 29, 1:58 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 47 min |
| Jun 29, 2:15 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 45 min |
| Jun 29, 2:30 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Dukes | 34 min |
| Jun 29, 2:37 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 38 min |
| Jun 29, 3:06 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 36 min |
| Jul 1, 7:03 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 31 min |
| Jul 2, 5:35 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, Worcester | 55 min |
| Jul 2, 5:48 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 57 min |
| Jul 2, 8:22 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Suffolk | 53 min |
| Jul 2, 9:09 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Plymouth, Suffolk | 47 min |
| Jul 5, 8:37 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 53 min |
| Jul 5, 9:31 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Suffolk, Worcester | 59 min |
| Jul 5, 10:25 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Plymouth, Suffolk, Worcester | 65 min |
| Jul 5, 10:44 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 45 min |
| Jul 5, 11:00 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth, Suffolk | 60 min |
| Jul 6, 7:09 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 66 min |
| Jul 6, 7:57 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire | 63 min |
| Jul 13, 2:44 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 61 min |
| Jul 13, 6:19 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, Worcester | 56 min |
| Jul 13, 7:06 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 54 min |
| Jul 13, 8:30 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 30 min |
| Jul 13, 8:31 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 41 min |
| Jul 14, 11:35 AM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 55 min |
| Jul 14, 12:05 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 55 min |
| Jul 14, 12:31 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 42 min |
| Jul 14, 1:08 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 67 min |
| Jul 14, 1:46 PM EDT | Severe Thunderstorm Warning | BOX | Bristol | 59 min |
| Jul 14, 2:37 PM EDT | Severe Thunderstorm Warning | BOX | Bristol | 68 min |
| Jul 22, 6:30 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 60 min |
| Jul 22, 6:51 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 54 min |
| Jul 23, 1:59 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 23 min |
| Jul 23, 2:33 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 43 min |
| Jul 23, 2:33 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 45 min |
| Jul 23, 2:39 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Middlesex, Worcester | 39 min |
| Jul 23, 2:56 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 64 min |
| Jul 23, 3:01 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 37 min |
| Jul 23, 3:20 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 55 min |
| Jul 23, 4:19 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 56 min |
| Jul 23, 4:33 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk | 57 min |
| Jul 23, 4:38 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth, Worcester | 67 min |
| Jul 23, 4:45 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Plymouth, Suffolk | 60 min |
| Jul 23, 5:08 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 67 min |
| Jul 23, 6:31 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 59 min |
| Jul 23, 6:34 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Plymouth | 41 min |
| Jul 29, 11:41 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire | 34 min |
| Jul 30, 12:41 AM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 35 min |
| Jul 30, 4:37 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 53 min |
| Jul 30, 5:35 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 55 min |
| Jul 30, 6:05 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 55 min |
| Aug 2, 2:17 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 58 min |
| Aug 2, 6:46 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire | 59 min |
| Aug 2, 7:54 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire | 39 min |
| Aug 4, 9:27 AM EDT | Severe Thunderstorm Warning | BOX | Franklin | 15 min |
| Aug 10, 5:07 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 53 min |
| Aug 10, 6:30 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 28 min |
| Aug 19, 5:28 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Suffolk, Worcester | 38 min |
| Aug 22, 10:38 AM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Worcester | 37 min |
| Aug 22, 12:15 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Plymouth | 45 min |
| Aug 22, 12:50 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth | 40 min |
| Aug 22, 1:28 PM EDT | Severe Thunderstorm Warning | BOX | Plymouth | 46 min |
| Aug 22, 1:39 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 51 min |
| Aug 22, 2:03 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth | 42 min |
| Aug 22, 2:42 PM EDT | Severe Thunderstorm Warning | BOX | Plymouth | 52 min |
| Aug 22, 3:14 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth | 61 min |
| Aug 22, 3:50 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth | 55 min |
| Aug 22, 4:30 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Bristol, Plymouth | 47 min |
| Aug 22, 5:09 PM EDT | Severe Thunderstorm Warning | BOX | Bristol | 50 min |
| Aug 22, 5:16 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable | 44 min |
| Aug 22, 5:51 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Dukes | 19 min |
| Aug 23, 2:21 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 54 min |
| Aug 23, 3:14 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Middlesex, Worcester | 61 min |
| Aug 23, 3:47 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Franklin, Middlesex, Worcester | 58 min |
| Aug 23, 4:12 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 63 min |
| Aug 23, 4:34 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Suffolk, Worcester | 56 min |
| Aug 23, 4:44 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 50 min |
| Aug 23, 4:55 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 65 min |
| Aug 23, 5:12 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk | 63 min |
| Aug 23, 5:28 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, Worcester | 62 min |
| Aug 23, 5:38 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Plymouth, Suffolk, Worcester | 52 min |
| Aug 23, 6:10 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth | 49 min |
| Aug 23, 6:15 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 60 min |
| Aug 23, 6:20 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth, Worcester | 40 min |
| Aug 23, 6:32 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 58 min |
| Aug 23, 7:22 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, Worcester | 53 min |
| Aug 24, 1:43 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Plymouth | 62 min |
| Aug 24, 2:43 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 62 min |
| Aug 24, 8:47 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 33 min |
| Aug 25, 5:52 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 53 min |
| Aug 25, 6:58 PM EDT | Severe Thunderstorm Warning | BOX | Bristol | 32 min |
| Aug 27, 2:24 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth, Worcester | 36 min |
| Aug 29, 6:32 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 58 min |
| Aug 29, 7:13 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 47 min |
| Aug 29, 7:15 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 60 min |
| Aug 29, 7:40 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 65 min |
| Aug 29, 7:57 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 63 min |
| Aug 29, 8:14 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 61 min |
| Aug 29, 8:52 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 53 min |
| Oct 7, 3:21 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 39 min |
| Oct 7, 3:56 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 34 min |
| Oct 7, 4:13 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 51 min |
| Oct 7, 4:27 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 33 min |
| Oct 7, 4:38 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 67 min |
| Oct 7, 4:50 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Middlesex, Worcester | 55 min |
| Oct 7, 4:57 PM EDT | Severe Thunderstorm Warning | ALY | Berkshire | 33 min |
| Oct 7, 5:22 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 38 min |
| Oct 7, 5:27 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Suffolk, Worcester | 48 min |
| Oct 7, 5:38 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Hampden, Middlesex, Norfolk, Plymouth, Worcester | 40 min |
| Oct 7, 5:47 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 58 min |
| Oct 7, 5:54 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Suffolk | 36 min |
| Oct 7, 6:03 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth, Worcester | 42 min |
| Oct 7, 6:36 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Bristol, Dukes, Plymouth | 39 min |
| Nov 15, 8:52 PM EST | Severe Thunderstorm Warning | BOX | Hampden | 53 min |
| Nov 15, 9:29 PM EST | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 34 min |
| Nov 15, 9:45 PM EST | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, Worcester | 45 min |
| Nov 15, 10:22 PM EST | Severe Thunderstorm Warning | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk and 1 more | 53 min |
| Nov 15, 10:24 PM EST | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth, Worcester | 66 min |
| Nov 23, 11:54 AM EST | Severe Thunderstorm Warning | BOX | Nantucket | 17 min |
| Nov 23, 11:58 AM EST | Severe Thunderstorm Warning | BOX | Barnstable | 21 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.